Snatch-block.



PATENTED DEG 5, T905.. A. OPSAL. l SNATGH BLOCK.

APPLICATION FILED' JAN. 9, 1905.

` 2 SHEETS-SHEET 1.

Il. IH!

ATTORNEYSv n.

' NrrED STATES PATENT y oprima ENGINEERING WORKS, OF PORTLAND, OREGON, A CORPORATION.

Speccation of Letters Patent.

' Patnted Dec. 5, 1905.

Application filed January 9, 1905. Serial No. 240,380.

To @ZZ whom it met?) concern:

.Be it known that I, ANDREW OPsAL, residing at Kelso, in the county of Cowlitz and State of Washington, have invented certain" new and useful Improvements in Snatch- Blocks, of which the following isa specification.

' My invention relates to certain new and usei ful improvements in` snatch-blocks and the like, and more particularly seeks to provide a device oi" this character of a very simple and economical construction and which will readily serveits lintended purposes.

`The invention also seeks to providea device of this character which is more particularly adapted for use in handling lumber, logs, and

the like.

Generically the inventioncomprehends a peculiar design or construction of sheave-block wherein -means vare provided for readily. andy easlly removing or'replaclng the rope on the' pulley and also wherein means are provided for protecting the pulley-rims and at the same time allowing for wear on the pulley-spindle,

as well as providing means for reducing thefriction between the pulley and the block.

With other objects in View which will be `hereinafter apparent the invention also in.

cludes certain novelconstruction and arrangement of parts, all of which will be first described in detail and then speciically pointed out in the appended claims, reference being had to the accompanying drawings, in which parte being shown in another position.

Figure 1 is a perspective view of my invention ready for use. l Fig. 2 1s a similar View, Fig.

A 3 is a perspective view showing the block ready for removing or replacing the rope on the pulley. Fig. 4: is a longitudinal section on the line 4 4 of Fig. 1. Fig. V5 is a vertical crosssection on the line 5 5 of Fig. 1. Fig. 6 is a side elevation of the block. Fig. 7 is a horizontal section on the line7 7 of Fig. 1. Fig.

8 is a detail perspective view of the sides of the block separated. Fig. 9 is a similar View of the pulley. Fig. 10 is a similar view of the pulley spindle or pin.Y

Referring now to the accompanying draw-- The .plate 2 is provided with an enlargement 2, which is centrally apertured, as at 2b, to receive the spindle' or pin 10,-hereinafter again referred to. Merging with the enlargement 2 and located near the top ofthe' side plate 2 is an ear 2c, which extends at right angles to the plate 2 and is provided with a transverse aperture 2d, through which the link 4, passes.

2e designates a groove on the peripheral edge of the ear 2, in which the locking-spring 5-`is held, and this spring is secured, as at 5, to the enlargement 2a and has its free 4ends bent over at right angles, as at 5b. These ends terminate ina U-shaped member 5 5, the freeends 5d 5d of which pass into bores 2g 2g of. the ear'2c. The U-shaped portions of the springs 5 serve as'catches for the .link 4 to hold it locked in its normal position. L(See Fig. 1.) p

The plate 2 has its inner face countersunk, as at 2m, to form an oval chamber surrounded by an oval rim 2n for the purposes presently to appear.

2p designates a spacing-lug integrally formed with the plate 2 at its lower extremity, and the said lug 2p is apertured, as at 2r 2r, to receive the securing-screws 2s 2S, as shown. Diametrically opposite the lug 2p the plate 2 is provided with an upwardly-extending portion 2x, which` merges with the ear 2c and which on its inner face has a semicircular depression 2y for the purposes presently eX- plained. The plate 3 is similarly Yformed as the plate 2.*and it is likewise provided with a spacing-lug 3p, having threaded apertures Sr, alining with the apertures 2r, to receive the threaded ends of the screws 2S. The plate 3 `is also countersunk, as at 3m, to form an oval chamber surrounded by an oval rim 3 of precisely the same form and Size as that of the plate 2. f f

Bbdesignates an aperture inthe plate 3, which has a square countersunk portion 3c to receive the square head 10'L of the pin 10, whose cylindrical body portion 10b passes through the aperture 3b and abutsfthe plate 2, while its reduced portion 10c passes through the aperture 2b in the plate 2 and is securely held in position by the nut 10d, as shown. The pin 10 is,v hollow and has its ends closed by the .screw-plugs 1091106, thereby forming an oilreceiving chamber from which the oil-vis also l TOO passed to the pulley-wheel 12, through the aperture 10g and the grooves 10h.

Extending upwardly from the plate 3, di ametrically opposite the lug 3p and in alinement with the projection 2x of the plate 2, is a pair of extending ears 3d 3d, between which the cross-head 6 is pivotally held on the pin (See Fig. 1.) The inner face of the extending portion of the ears 3d, where the said ears join the plate 3, is provided with a groove 3y, similar to the groove 2y, between which4 grooves .2y 3y the head 8a of the swivel-pin 8 rests. The pin 8 has a shank 8b, which passes through the bore 6a of the cross-head 6 and terminates in a ring 8c, through which and the eye 9 of the hook 9 the link 91 is passed. The cross-head 6 also includes an ear 6b, by means of which and the pin 7 it is pivot-ally joined with the ears 3d 3d, and the said crosshead 6 is provided with a finger 6, having a curved edge 6d and the grooves 6f in its upper edge 6e, which receive the link 4 when the parts are in the normal or locked posi.- tion.

6m 6m designate grooves in the side faces of the cross-head 6, in which the spring members 6 6n are held. These spring members 6n 6l1 are secured to the cross-head 6 at one end and have their other ends provided with latch portions 6p 6p to hold the link i in its locked position.

11 designates a'spring member secured at one end to the lug 2c, as at 11, and has its free end 11b engaging the under edge 6x of the finger portion 6c of the cross-head 6 to hold the said cross-head 6 with its finger portion away from the plate 2, so that when the link 4 is in its locked position and resting with its upper portion 4x in the grooves 6f the said spring 1 1 will hold the finger 6c tightly against the portion 4X of the link 4 to prevent the said link 4 from getting loose and riding out of the groove 6i. It should be understood that to release the cross-head from engagement with the link 4 it is only necessary to press outwardly on the said cross-head to relieve the tension of the spring l1, when the link can be thrown off.

The pulley 12 is rotatable on the pin 10 between the plates 2 and 3 with its fianges 12a 12 in the countersunk chamber portions 21u 3m, so that the oval rims 211 3 protect the flanges 12 12a of the pulley, and thereby prevent the rope or cable from wearing on or getting between the sides of the plates 2 and 3 and the sheave or pulley 12, and also prevent the pulley from breakage. By providing the countersunk portions 2m 3, of oval shape, spaces m and y are formed at the top and bottom of the block to prevent'friction in case the pin 10 becomes worn and at the same time to allow anything which would come in between the pulley or sheav'e and the sides of the block to pass out.

So far as described it will be seen that I have provided a very simple, easily-operable, and durable snatch-block which can be easily and cheaply manufactured and which will effectively serve its intended purposes.

From the foregoing description, taken in connection with theaccompanying drawings, it is thought the complete construction, operation, and many advantages of' my invention will be readily understood by those skilled in the art to which it appertains, and I desire to say that many slight changes in the detail construction and arrangement of parts may be made without departing from the invention or the scope of the appended claims.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A device ofthe character described, comprising a pair of' plates, a pulley mounted therebetween, a cross-head hingcdly secured to one of said plates, said cross-head having a finger, a link carried by said second plate to engage said cross-head finger, and means carried by said second plate for locking said link in position with respect to said finger.

2. A device ofthe character described, comprising a pair of plates, a pulley mounted therebetween, a cross-head hingedly secured to one of said plates, said cross-head having a finger, a link carried by said second plate to engage said cross-head finger, means carried by said second plate forlocking said link in position with respect to said finger, said means comprising a spring member carried by said second plate.

3. A device of the character described, comprising a pair of plates, a pulley mounted therebetween, one of said plates having projecting lugs, a cross-head hingedly secured to said plate between said lugs, said cross-head having a finger, a link carried by said second plate toiengage said cross-head linger, means carried by said second plate for locking said link in position with respect to said linger, said means including a spring member carried by said second plate, as set forth.

4. A device ofthe character described, comprising a pair of plates, a pulley mounted therebetween, a cross-head hingedly secured to one of said plates, said cross-head having a finger, a link carried by said second plate to engage said cross-head finger, means carried by said cross-head to lock said link in position with respect to said finger, means for holding said finger against said link when the link is in its locked position.

5. A device of the charaeterdescribed, comprising a pair of plates, a pulley mounted therebetween, a cross-head hingedly secured to one of said plates, said cross-head having a finger, a link carried by said second plate to engage said cross-head finger, means carried f by said cross-head to lock said link in position IOO IIO

with respect to said nger, means for holding l said finger against said link when the link isin its locked position, said last-named means including a spring member secured to the vsecond plate and engaging said cross-head.

6. In a device of the character stated, a pair of plates having oval countersunk chamber Aportions facing each other, a pulley having 'rims held between said plateswith its rims in said countersunk portion, said plates having spacing-lugs at the bottom, a spindle passing `through the plate and the pulley, all being ar- Y body portion and a finger, said finger having-l a transverse groove in its upper edge, a swivelpin passing through said cross-headbody portion and terminating in a swivel-head, said swivel-head being .leld between said plates,g

said plates each having grooved portions to receive said swivel-head, substantially as shown.

8. In a device of the character described, a pair of plates, a pulley-wheel rotatably mounted therebetween', one oi" said plates having upwardly-proj ecting ears, a cross-head fulcruined i between said ears, said cross-head including a body portion and a finger, said finger having a transverse groove in its upper edge, aswiveli pin passing through saidcross-head body7 portion and terminating in a swivel-head, said swivel-head being held between said plates, said plates each having grooved portions to receive said swivel-head, a link carried yby said second plate for engaging and resting in said cross -head inger-groove, substantially as shown. n

9. In a device of the character described, a pair of plates, apulley-wheel rotatably mounted therebetween, one of said plates having upwardly-projectingears,across-headfulcrumed between said ears, said cross-head includinga.

body portion and a nger, said finger having a transverse groove in its' upper edge, a swivelpin passing through said cross-head body portion and terminatingy in a swivel-head,'said swivel-head being held between said plates, said plates each having grooved portions to receive said swivel-head, a link carried by said second plate for engaging Iand resting in said cross-head finger-groove, and means for holding said link locked in position with respect to said finger.

10. In adevice of the character described, a

pair of plates, a pulley-wheel rotatably mounted therebetween, one of said plates having up-l wardly-projecting ears,across head fulcruined between said ears, said cross-head including a tion andy terminating in a swivel-head., said swivel-head being held between said plates, said plates having grooved portions'to receive said swivel-head, said second plate having a lug extending at right angles thereto, a'link pivotally connected to said lug, said link adapted to engage and lock with said finger, substantially as shown.

1l. In a device of the character described, a pair of plates, a pulley-wheel rotatably mounted therebetween, one of said plates having upwardly-projecting ears,acrosshead fulcru med between said ears, said cross-head including a body portion and a finger, said linger having a transverse groovein its upper edge, a swivelpin passing through said cross-head body portion and terminating in a swivel-head, said swivel-head being held between said plates, said plates having grooved portions to receive said swivelhead,said second plate having a lug extending at right angles thereto, a link pivotally connected to said lug, said link adapted to engage and lock with said finger, and means for locking saidlink in engagement with said finger. 4

`l2. In a device of the character described, a pair of plates, a pulley-wheel rotatably mounted therebetween, one of said plates having upwardly projecting ears, a vcrosshead fulcrumed between said ears, said cross-head including a body portion and a finger, said finger having a transverse groove in its upper edge, a swivel-pin passing throiighsaidv crosshead body portion and terminating in a swivelhead, said swivel-head being held between said plates, said plates having grooved portions to receive said swivel-head, said second platehaving a lug extending at right angles thereto, a link pivotally connected to said lug, said link adapted to engage and lock with said finger, yand means-forlocking said link in engagement with said finger, said means including a spring member secured to said lug and engaging said link. y

13.` In a device of the character described, a' pair of plates, a pulley-wheel rotatably mounted therebetween, one of said plates having uplug, said link adapted to engage and lock with ment with-said link.

14. In a device ofthe character described, a pair of plates, a pulley-wheel rotatably mount- IOO .lIO

ed therebetween, one of said plates having upwardly projecting ears, a cross -head fulcrumed between said ears, said cross-head 1n- .cluding a body portion and a finger, said finger having a transverse groove in its upper edge, a swivel-pin passing through said crosshead body portion and terminating in aswivelhead, said swivel-head being held between said plates, said plates having grooved portions to receive said swivel-head, said second plate having a lug extending at right angles thereto, a link pivotally connected to said lug, said link adapted to engage and lock with said inger, and means for locking said link in engagement with said finger, said means including spring members secured to said cross-head and engaging said link, and a supplemental spring secured to the second plate-lug and engaging said finger to press it upwardly, substantially as shown and described.'

15. A device of the character stated, comprising a pair of plates, a pulley mounted therebetween, a cross-head hingedly secured to one of said plates, said cross-head having a linger, said second plate having a lug, a link carried by said second plate-lug to cngage said cross-head linger, means carried by the second plate-lug for locking said link in position with respect to said linger, and means carried by the second plate-lug for forcing the cross-head upwardly substantially as shown and described.

ANDREW OPSAL. Witnesses:

W. J. MAKELIM, A. G. WEIKAL. 

